ArticleACS omega2025
Dust-Free Sol-Gel Synthesis of Neodymium Oxide Microspheres as a Surrogate for Americium-241 Fueled Radioisotope Power Systems.
Article in ACS omega, 2025. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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Abstract
New designs for radioisotope power systems (RPS) explore the use of Am-241 as a fuel source. Neodymium is a common surrogate for americium and the work here presents a citrate-modified internal gelation route was applied to synthesize neodymium oxide microspheres, as a surrogate for americium oxide microspheres with applications in these new RPS designs. Neodymium has not previously been gelled on its own using the internal gelation route as the pH of neodymium hydrolysis and precipitation is higher than that achieved in the internal gelation process. However, the inclusion of citric acid as a precursor allows for the neodymium to deprotonate and coordinate to the citrate groups rather than hydrolyze, which results in the precipitation of a 1:1 neodymium citrate gel. Subsequent heat treatment to 950 °C under adequate air flow decomposes the residual organics and citrate groups resulting in the formation of the high temperature trigonal phase of Nd
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